do not drink alcohol in excess with cialis. side effects may include headache, upset stomach, delayed backache or muscle ache. to avoid long-term injury, seek immedte medical hel for an erection lasting more than 4 hours. if you have any sudden decrease or loss in hearing or vision, or if you have any allergic reactions such as rash, hives, swelli of the lips, tongue or throat, or difficulty breathing or swallowing, stop taking cialis and get medical help right away. ask your doctor about cialis for dailyse and a 30-tablet free trial. cheryl: legendary investor warren buffett said to his son, if you have the resources to accomplish something great in the world, what would you do? well today, howard buffett has given himself a deadline of 40 years to put more than $3 billion to work on easing lives of people who don't have enough to eat. so where has the journey taken him? joining us now, howard buffett, howard g. buffett chairman and foundation ceo and author of finding hope in a hungry world. great to have you in the studios.